Gemfile: temporay pin "bcrypt" version and run "bundle update bcrypt" on Linux

Related: #19617, #19187, #19533, #19689, #19675.

This is POC (Proof Of Concept) which bundler does not remove mingw lines.
https://github.com/rails/rails/pull/19617#issuecomment-90293795

Gemfile

@@ -22,7 +22,7 @@ gem 'sprockets', '~> 3.0.0.rc.1'
 # require: false so bcrypt is loaded only when has_secure_password is used.
 # This is to avoid ActiveModel (and by extension the entire framework)
 # being dependent on a binary library.
-gem 'bcrypt', '~> 3.1.7', require: false
+gem 'bcrypt', '~> 3.1.10', require: false
 
 # This needs to be with require false to avoid
 # it being automatically loaded by sprockets

Gemfile.lock

@@ -99,6 +99,8 @@ GEM
       beaneater (~> 0.3.1)
       dante (~> 0.1.5)
     bcrypt (3.1.10)
+    bcrypt (3.1.10-x64-mingw32)
+    bcrypt (3.1.10-x86-mingw32)
     beaneater (0.3.3)
     benchmark-ips (2.1.1)
     builder (3.2.2)
@@ -126,6 +128,7 @@ GEM
     globalid (0.3.3)
       activesupport (>= 4.1.0)
     hitimes (1.2.2)
+    hitimes (1.2.2-x86-mingw32)
     i18n (0.7.0)
     json (1.8.2)
     kindlerb (0.1.1)
@@ -147,6 +150,10 @@ GEM
     mysql2 (0.3.18)
     nokogiri (1.6.6.2)
       mini_portile (~> 0.6.0)
+    nokogiri (1.6.6.2-x64-mingw32)
+      mini_portile (~> 0.6.0)
+    nokogiri (1.6.6.2-x86-mingw32)
+      mini_portile (~> 0.6.0)
     pg (0.18.1)
     psych (2.0.13)
     que (0.9.2)
@@ -240,6 +247,8 @@ GEM
 
 PLATFORMS
   ruby
+  x64-mingw32
+  x86-mingw32
 
 DEPENDENCIES
   activerecord-jdbcmysql-adapter (>= 1.3.0)
@@ -247,7 +256,7 @@ DEPENDENCIES
   activerecord-jdbcsqlite3-adapter (>= 1.3.0)
   arel!
   backburner
-  bcrypt (~> 3.1.7)
+  bcrypt (~> 3.1.10)
   benchmark-ips
   coffee-rails (~> 4.1.0)
   dalli (>= 2.2.1)